It's utterly shattered. The central core has been destroyed by the exploding reactors, while the outer rings and connecting corridors have been cast off into space by the explosion. Fortunately the emergency bulkheads allowed nearly six hundred people to ride out the explosion on the station, and the command staff in Ops was rescued by a runabout making a run with transporters, but, yes.

Construction on a new Deep Space Nine begins almost immediately thereafter.